438596431977636 has 45 divisors (see below), whose sum is σ = 1146578694992731. Its totient is φ = 146198685003048.

The previous prime is 438596431977577. The next prime is 438596431977643. The reversal of 438596431977636 is 636779134695834.

The square root of 438596431977636 is 20942694.

It is a perfect power (a square), and thus also a powerful number.

438596431977636 is a `hidden beast` number, since 4 + 3 + 8 + 5 + 96 + 431 + 97 + 7 + 6 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 376386751 + ... + 377550233.

Almost surely, 2^{438596431977636} is an apocalyptic number.

438596431977636 is the 20942694-th square number.

It is an amenable number.

438596431977636 is an abundant number, since it is smaller than the sum of its proper divisors (707982263015095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438596431977636 is an frugal number, since it uses more digits than its factorization.

438596431977636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326982 (or 1163488 counting only the distinct ones).

The product of its digits is 14814213120, while the sum is 81.

438596431977636 divided by its sum of digits (81) gives a square (5414770765156 = 2326966²).

The spelling of 438596431977636 in words is "four hundred thirty-eight trillion, five hundred ninety-six billion, four hundred thirty-one million, nine hundred seventy-seven thousand, six hundred thirty-six".